Aluminium oxide is impermeable and, unlike the oxide layers on many other metals, it adheres strongly to the parent metal. If damaged mechanically, aluminiumâs oxide layer repairs itself immediately.
Saliva helps remove oral waste and cavity-causing bacteria, protects teeth from decay by neutralizing harmful acids, and helps re-mineralize tooth enamel. Saliva also keeps oral tissues healthy by preventing infection by controlling bacteria and fungi in the mouth.
Salivary Gland Problems. Your salivary glands produce as much as a quart of saliva each day. Saliva is important to lubricate your mouth, help with swallowing, protect your teeth against bacteria, and aid in the digestion of food.